Promising first couple chapters w/ a charming heroine, a credibly nasty first arc villain, and some intriguing support characters. The art's nice art, too, and I quite like the sketch-magic concept.
Although other commenters have complained, I don't see anything too terribly illogical or cliched so far. That said, no new ground is being broken, and nothing yet elevates this above the large pack of other "better than average" heroic fantasy manga.
Bottom line: as a sucker for fairy tale crossovers, I'm on board - at least for now.